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tewg-minutes-90dec.txt
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1993-02-17
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CURRENT_MEETING_REPORT_
Reported by Phill Gross/CNRI
TEWG Minutes
Past IETF meetings have typically featured status reports from various
operational networks. These have included NSFnet, the US DOE Energy
Science netwowrk (ESnet), the US NASA Science Internet (NSI), DCA
Milnet, and more recently, occasional regional networks and European
networks. These reports have typically been featured during the
technical plenary session.
Starting at the Boulder IETF meeting, the network status reports have
been moved into the Topology Engineering Working Group sessions. This
is in response to suggestions from IETF participants to make time for
additional technical presentations during the plenary sessions. This
will also have the effect of providing more time for those interested in
network operations to interact in more detail.
This represents a shift in emphasis for the Topology Engineering Working
Group. I'd like to consider this an experiment for the next few
meetings, after which, I will poll regular TEWG attendees, and others
interested in network operations, for comments regarding the new format,
and whether there are other operational topics that TEWG (or, perhaps,
another Working Group in the Operational Requirements Area) should
consider.
Dale Johnson (MERIT) submitted the text below to accompany his slide
presentation.
NSFNET Presentation (Dale Johnson /MERIT)
o NSFNET T1 Backbone 1990:
An additional node was added to the NSFNET T1 backbone in October
of 1990 in Atlanta, Georgia, bringing the total number of nodes on
the backbone to 14.
The Atlanta NSS is located at Georgia Institute of Technology and
is connected to the NSSs in Houston and Pittsburgh. In November,
the Atlanta NSS passed 164 million packets, which was more than
that passed by two other NSSs.
o NSFNET T3 Backbone 1990:
The real story of the NSFNET is occurring with the current
engineering of the T3 network. Merit has a goal of passing some
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production traffic on the new T3 network within calendar year 1990.
T3 NSSs will be located in the eight locations shown, which include
two new sites in Argonne, Il. and Cambridge, MA.
The T3 network is being engineered and built as a totally separate
peer backbone to the T1 network. It will have its own AS number,
and will interoperate with the T1 network using an exterior gateway
protocol.
o NSFNET T1/T3 Backbones 1990:
As can be seen in the combined T1 and T3 map (see slides), several
sites will have both a T1 NSS and a T3 E-NSS (exterior NSS - see
below). Packets will be routed between the two backbones at these
locations.
o NSFNET T1 Architecture:
This is a diagram of the T1 NSS and circuit architecture as it
relates to the MCI backbone junction point, or Point of Presence,
(POP). In the diagram, everything inside the circle is physically
located at the MCI POP.
The circles labeled DXC represent MCI backbone Digital
Cross-Connect switches. There are two (or more) clear-channel T1
circuits which run over local loops from the DXC to the NSS located
at the university or supercomputer site.
This architecture does allow for redundant circuits from the MCI
backbone to the site, however an outage at the site not only
disrupts traffic to that site, but also disrupts backbone traffic
running through that site but destined for other locations.
o NSFNET T1 Architecture:
The diagram of the T3 architecture indicates that there will be two
new types of NSSs at each node on the backbone. Again, everything
inside the circle is physically located at the MCI POP.
As indicated in the diagram, the first new type of NSS, the
Core-NSS (C-NSS) will be collocated at the MCI POP. The C-NSSs will
form a backbone infrastructure which will be independent of
activity at the end sites. Therefore, an outage at an end site
will affect traffic only to that site, not backbone traffic
destined for other sites.
The second type of NSS, the ExteriorNSS (E-NSS) will be located on
site at the organization hosting the node, as is done in the T1
backbone. The E-NSS will be connected to the C-NSS by a single T3
pipe.
o Number of Networks Graph:
The number of networks configured on the NSFNET backbone reached
2063 by the end of October 1990. This included 527 foreign
networks. The number of configured nets by the end of November
1990 totalled 2125. (Chart not available at the time of this
presentation.)
o NSFNET Monthly Traffic in Packets:
Traffic in packets for the month of October 1990 was 5.25 billion.
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This represents a 269
o Major NSFNET Applications By Packets:
As is the norm, networked mail applications and file exchange
accounted for the highest usage of the backbone in September of
1990. Interactive applications, again as is the norm, accounted
for the third highest usage of the backbone.
o NSFNET - The Reliable Network:
The NSFNET backbone maintained an average uptime status of
99.88through September 1990. Included in this calculation are
Class One outages only, which means a node site was completely
unreachable due to an NSS being down. Planned outages, such as for
UPS maintenance, are included in this figure.
Attendees
Vikas Aggarwal vikas@JVNC.net
Guy Almes almes@rice.edu
Ronald Broersma ron@nosc.mil
Robert Cooney cooney@wnyose.nardac-dc.navy.mil
Tom Easterday tom@nisca.ircc.ohio-state.edu
Fred Engel engel@concord.com
Peter Ford peter@acl.lanl.gov
Vince Fuller vaf@Standford.EDU
Phillip Gross pgross@nri.reston.va.us
Tony Hain alh@eagle.es.net
Susan Hares skh@merit.edu
Eugene Hastings hastings@psc.edu
Kathleen Huber khuber@bbn.com
Dale Johnson dsj@merit.edu
Philip Karn karn@thumper.bellcore.com
Holly Knight holly@apple.com
William Kutz Kutz@dockmaster.ncsc.mil
E. Paul Love loveep@sdsc.edu
Matt Mathis mathis@pele.psc.edu
Milo Medin medin@nsipo.nasa.gov
Donald Morris morris@ucar.edu
Chris Myers chris@wugate.wustl.edu
David O'Leary oleary@noc.sura.net
Joel Replogle replogle@ncsa.uiuc.edu
Robert Reschly reschly@brl.mil
Timothy Salo tjs@msc.edu
Tom Sandoski tom@concert.net
Bernhard Stockman boss@sunet.se
Roxanne Streeter streeter@nsipo.nasa.gov
Kannan Varadhan kannan@oar.net
Carol Ward cward@spot.colorado.edu
Dan Wintringham danw@osc.edu
Robert Woodburn woody@sparta.com
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